Hi Everyone this is Prem, I have worked as Microsoft 365 Support Ambassador. In this blog I am going to share steps which we use to Turn Off Outlook on the Web in Office 365.
Outlook on the web is basically Outlook application which is available when you login to Office.com with the account which has Exchange online plan license assigned to it:

It will show you Outlook as an app under application and Once you click on it, it display you all the emails and you can send/ receive emails using it, it like a lighter version of desktop outlook:

In some organization Outlook on the web is restricted as user can login on any computer’s browser and access their emails.
In this blog I will share steps to Turn OFF Outlook on the web access of a particular user, It is turned ON by default on a tenant so to Turn OFF we will go to Exchange Admin Center, sign in with the Admin email and password.
We will click on Recipient > Mailboxes > Select the user account or double click on it, on which we want to disable the Outlook Web Access:

A New window will open, click on Mailbox feature and then Scroll down till you see a feature name “Email Connectivity” as seen on the image above.
Under Email Connectivity, You will find the status of the Outlook on the web for the current user account, if its is enabled you can click on Disable option below and then select “Yes” when prompted for confirmation, this should turn OFF Outlook on the web(Also know as OWA) for the selected user account.
Now if the user login to Office.com on the browser he/she will not see the Outlook Icon under apps section.
In this way we can Turn Off Outlook on the Web for a user account. Do let us know if this helped.
Date: 14/06/2021
Author: Prem
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